MIC2843A Datasheet | Micrel Semiconductor

Description Features The MIC2843A is a high efficiency linear White LED - High Efficiency (no Voltage Boost losses) (WLED) driver designed to drive up to six WLEDs, greatly - Dynamic Average Matching (DAM™) extending battery life for portable display backlighting - Ultra Fast PWM™ control (200Hz to 500k Hz) keypad backlighting, and camera flash in mobile devices. - Input voltage range: 3.0V to 5.5V The MIC2843A provides the highest possible efficiency as - Dropout of 40m V at 20m A this architecture has no switching losses present in traditional charge pumps or inductive boost circuits. The - Matching better than ±1.5% (typical) MIC2843A provides six linear drivers which maintain - Current Accuracy better than ±1.5% (typical) constant current for up to six WLEDs. It features a typical - Maintains proper regulation regardless of how many dropout of 40m V at 20m A. This allows the WLEDs to be channels are utilized driven directly from the battery eliminating switching - Available in a 10-pin 2mm x 2mm Thin MLF® package noise/losses present with the use of boost circuitry. The MIC2843A features Dynamic Average Matching™ Applications (DAM™) which is specifically designed to provide optimum matching across all WLEDs. The six channels are - Mobile handsets matched better than ±1.5% typical, ensuring uniform - LCD Handset backlighting display illumination under all conditions. The brightness is - Handset keypad backlighting controlled through an Ultra Fast PWM™ interface operating down to less than 1% duty cycle. - Digital cameras The MIC2843A is available in the 10-pin 2mm x 2mm Thin - Portable media/MP3 players MLF® leadless package with a junction temperature range - Portable navigation devices (GPS) of -40°C to +125°C. - Portable applications Datasheets and support documentation can be found on Micrel’s web site at: .micrel.. ____________________________________________________________________________________________________________ Typical Application U1...